Is it possible to tell whether a network socket is/will be a real time socket or a regular socket runtime?

[Per Oberg <pero@wolfram.com>]

Hi list

Is there a way that I can tell if a network socket is a real time socket or a regular socket runtime ?
Usually I always know beforehand whether something is going to be a real time socket or a std posix socket. Now it will depend on the host-address. 

I have this posix-skin application that can be both real time and non real time depending on available network hardware. Because of the differences between RTNet and regular posix net implementation i sometimes have to choose between setsockopt/ioctl when setting the properties. Therefore I need to handle a few lines of code differently depending on the situation.

This brings up another issue I have been struggling with for the posix-skin. 
When, in this snippet of code, is it decided whether __std or __cobolt functions are executed ? 

Is it run-time or compile time ? If runtime, is it during the connect or during the sendto ? 

serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr(host_name);
serv_addr.sin_port = htons( portno );
sockfd = socket(AF_INET, SOCK_DGRAM,0);
connect( sockfd, ( struct sockaddr * ) &serv_addr, sizeof( serv_addr))
sendto(sockfd, (char*) &packet, sizeof( packetType ), MSG_DONTWAIT, NULL, sizeof( serv_addr ));

Regards
Per Öberg